He won't listen. Such data completely refutes his worldview, so it will be dismissed out of hand. If you receive a reply to this, don't expect it to be substantive.
"The first members of the new group are not bizarre, chimeric animals; they are simply a new, slightly different species, barely different from the parent species. Eventually they give rise to a more different species, which in turn gives rise to a still more different species, and so on, until the descendents are radically different from the original parent stock. "
Yeah, thats the ticket fellow.
When was the last time you noticed a new species spring forth ?
I've never seen an acorn grow out to be a pine tree ... have you ?